Need to create a measure to calculate the sales for the last 12 months.

[Anonymous]

Have a Power BI model that contains the following tables:
Sales11 (Sales_ID, DateID, sales_amount)
Date11 (DateID, Date, Month, week, Year)
The tables have a relationship. Date is marked as a date table in the Power BI model.
You need to create a measure to calculate the sales for the last 12 months.

Which DAX formula should you use?
1. CALCULATEx(SUM(sales11[sales_amount]) DATESYTD (‘Date11’ [Date]))
2. CALCULATE(SUM(sales11[sales_amount]), SAMEPERIODLASTYEAR (‘Date11’ [Date]))
3. SUM(sales11[sales_amount])-CALCULATE(SUM(sales11[sales_amount]),SAMEPERIODLASTYEAR(‘Date11’[Date]))
4. SUM(sales11[sales_amount])-CALCULATE(SUM(sales11[sales_amount]),DATESYTD(‘Date11’[Date]))

Which one is correct 3 or 2? and explain why?

At one Place I found 2 is correct and at another place 3 is correct..

Got confused. Please help

[Anonymous · Accepted solution]

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@Anonymous wrote:

Have a Power BI model that contains the following tables:
Sales11 (Sales_ID, DateID, sales_amount)
Date11 (DateID, Date, Month, week, Year)
The tables have a relationship. Date is marked as a date table in the Power BI model.
You need to create a measure to calculate the sales for the last 12 months.

Which DAX formula should you use?
1. CALCULATEx(SUM(sales11[sales_amount]) DATESYTD (‘Date11’ [Date]))
2. CALCULATE(SUM(sales11[sales_amount]), SAMEPERIODLASTYEAR (‘Date11’ [Date]))
3. SUM(sales11[sales_amount])-CALCULATE(SUM(sales11[sales_amount]),SAMEPERIODLASTYEAR(‘Date11’[Date]))
4. SUM(sales11[sales_amount])-CALCULATE(SUM(sales11[sales_amount]),DATESYTD(‘Date11’[Date]))

Which one is correct 3 or 2? and explain why?

At one Place I found 2 is correct and at another place 3 is correct..

Got confused. Please help

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I tested this and correct ans is SUM(sales11[sales_amount])-CALCULATE(SUM(sales11[sales_amount]),SAMEPERIODLASTYEAR(‘Date11’[Date]))

I have 3 years of sales data.

2013, 2014, 2015

Total sales= 15000 (sum of 3 years sales)

2013 Sales=4000

2014 Sales=5000

2015 Sales=6000

SUM(sales11[sales_amount]) Returns=15000

and CALCULATE(SUM(sales11[sales_amount]),SAMEPERIODLASTYEAR(‘Date11’[Date])) returns =9000

So

SUM(sales11[sales_amount])-CALCULATE(SUM(sales11[sales_amount]),SAMEPERIODLASTYEAR(‘Date11’[Date]))=15000-9000=6000

[Mariusz]

Hi @Anonymous 

You can use the below

Sales Rolling 12 months = 
CALCULATE(
    [Sales],
    DATESINPERIOD(
        'Calendar'[Date],
        MIN('Calendar'[Date]) -1,  
        -12,
        MONTH
    )
)

Regards,
Mariusz

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[Anonymous]

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@Mariusz wrote:

Hi @Anonymous 

You can use the below

Sales Rolling 12 months = 
CALCULATE(
    [Sales],
    DATESINPERIOD(
        'Calendar'[Date],
        MIN('Calendar'[Date]) -1,  
        -12,
        MONTH
    )
)

Regards,
Mariusz

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

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Thanks for your response. 

This is a mockup question and need to select an ans from given list. Would you please provide your ans from given options?

Thanks again.

[parry2k]

@Anonymous look at this post which gives you last 12 months sum

[Anonymous]

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@parry2k wrote:

@Anonymouslook at this post which gives you last 12 months sum

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Thanks for your response. 

This is a mockup question and need to select an ans from given list. Would you please provide your ans from given options?

Thanks again.

[parry2k]

@Anonymous clearly not sure what you are asking here.